...[#Blelloch90##1#]

In previous descriptions of the language, the term step was used instead of depth.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...NESL

This is not strictly true since some of the utility functions, such as reading or writing from a file, have side effects. These functions, however, cannot be used within an apply-to-each construct.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...added.

To simulate the built-in sum, it would be necessary to add code to return the identity (0) for empty sequences.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...classes.

It is likely that future versions of NESL will allow such extensions.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...respectively.

For comments about how these equations relate to the current implementation see Appendix C.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.